Asteroid Trails in HST Archive Images

Details Asteroid Trails in HST Archive Images Asteroid Trails in HST Archive Images

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997hst..prop.8009e&link_type=abstract

HST Proposal ID #8009

Computer Science

Hst Proposal Id #8009 Solar System

Scientific paper

Numerous trails from small, main-belt asteroids can be found in Archival HST images. Our initial study of the first two years of WFPC2 data {Evans et al. 1998, Icarus in press} found 230 images with trails from 96 distinct objects. The trails show a remarkable curvature due to the parallax induced by HST's orbital motion during the exposures. Using ephemerides for HST, the geocentric distance to each asteroid can be directly determined from the parallax contribution to the trail shapes. The availability of accurate distances allowed a meaningful absolute magnitude {size} histogram to be constructed for these without need of full orbit determinations. We found evidence for a shallower slope in the asteroid size {magnitude} distribution function {over the range 20

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